By Katherine Hamilton
Serina Therapeutics got supportive feedback from the Food and Drug Administration for its trial design for a Parkinson's treatment. Shares climbed 33% to $7.50 in after-hours trading Monday.
Interactive Brokers will replace Walgreens Boots Alliance on the S&P 500, and Talen Energy will take the brokerage's spot in the S&P MidCap 400. Kinetik is replacing Pacific Premier Bancorp in the S&P SmallCap 600. Shares of Interactive Brokers rose 4% to $65.38 after the bell, while Talen Energy's stock advanced 4% to $370.83, and Kinetik's shares increased 5% to $42.84.
Write to Katherine Hamilton at katherine.hamilton@wsj.com
(END) Dow Jones Newswires
August 25, 2025 19:43 ET (23:43 GMT)
Copyright (c) 2025 Dow Jones & Company, Inc.
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